Hello
This has been answered partially in How to calculate the GWP-GHG indicator when using OpenLCA and 15804 A2 2020 impact assessment methods Ashraka_ and Conrad
Please may you confirm the characterisation factors to set to zero are as below (and no other changes are needed):
Many thanks
| Flow | Category | Factor | Unit | Uncertainty |
| Carbon dioxide, from soil or biomass stock | Elementary flows/Emission to air/low population density | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, from soil or biomass stock | Elementary flows/Emission to air/unspecified | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, in air | Elementary flows/Resource/in air | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, non-fossil | Elementary flows/Emission to air/high population density | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, non-fossil | Elementary flows/Emission to air/low population density | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, non-fossil | Elementary flows/Emission to air/unspecified | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, non-fossil, resource correction | Elementary flows/Resource/in air | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, to soil or biomass stock | Elementary flows/Emission to soil/agricultural | 0 | kg CO2 eq/kg | none |
| Carbon dioxide, to soil or biomass stock | Elementary flows/Emission to soil/unspecified | 0 | kg CO2 eq/kg | none |
